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Nov. 20, 1928. 7 W. M. SCHLWARTZ.

PANEL I Original Filed May 1926 Invnior;

i which the Han Reissued Na. 20, 1928.

UNITED sTA-TES [PATENT "-Q WALTER M. scnwaiz'rz, or rfinanarrnm, PENNSYLVANIA, ASSIGNOR tro iisuai 'lliaa a;

scnwanrz, INCORPORATED; or rnrrananrnm. PENNSYLVANIA, QORPORA- TION OF PENNSYLVANIA.

rA EL.

Original No. 1552,03, dated gan e, 19a7,s er1a1 No. 107,675,. filed May 8;. 192a. 'apiiii 10510:

. ireis nue flled October 5, 1928. Serial No. 310,637.

I My invention relates to certain' improvements in metal panels, preferably ofv-the'type having non-conducting material between" e inner and outer walls. Panels of this type are used in drying apparatus forpre'venting heat from radiating through the walls of the ap aratus. y 1 1 ne object {of this invention is to provlde a panel 'withasrecess at the edge for the reception ofanon-conducting strip'of material, preferably cork.

Another object of the invention is to so construct the panels that when the panels are assembled, the cork insert of one panel will be in contact with the insert of an adjoinin 'paneL' In t e accompanying drawings: Fig. 1 is a face view of my improved panel; Fig. 2 is an enlarged sectional view on the line 2-2,'Fig. 1; v e

Fig. 3 is a sectional view of a panel 111 is formed by bending one of the plates 0 the panel; Fi 4 is a sectional-perspective view of the panelshown in Fig. 2; i p

Fig. 5 is a sectional perspective view showing-two panels arranged side by the flanges overlapping;

Fig. 6 is aviewshowing another method of assembling the panels; and

Fig. 7 is a view showingthe arrangement of the panel in forming a corner. The panel 1 is made of any size and shape desired, and consists. of two sheet-metal plates 2 and 3. The plate 2-is a flat sheet,

- while the plate 3 ,is bent at right angles to form a wall 4 and is bent at 5 parallel with the plate 2, the portions 5 being spot-welded to the plate 2. The depth of the angular wall 4 determines the thickness of the panel. The space between the two plates 2 and 3 is filled with any suitable heat non-conducting mate rial 6, such for instance asasbestos. I

Achannel 7 is formed at the edges of the panel either by welding or otherwise securing-a light an le strip 8 to the plate 2, as in Fig.2, or ben ing the edges of the plate 2 to form a flange 8,

- The first-mentioned COIlStIllCtlOIl' 1s" preferably used on a removable paneLand theother;

k side and tending outwardly from and suehas cork. The cork is cutto' size and; is

construction is used on a. fixed ,panel as in -,j F g. 5, but either form may be adopted as? desired. 11 5.,

Inthe channel. formed'by th'e flanges" is. located a strip of non-conducting.material9,

be no metallic contact of one panel with an-[ .'other or with astructural support.

The panels are so arranged that thereis a clear space farf between the panels as in Fig. 5. i

' By the above construction a comparatively small amount of heat is conducted from the inner late of a drier to the outer plate.

In 1g5 is a view showing two. panels arranged side by side, one panel 1 being a fixed panel of a. dryingmachine, while the other panel 1" is a removable panel detachably secured to the fixed panel by any suitable clamp 10. i

edges [of v the v Fig. 6 illustrates one arrangement by which the panels are secured to the structural angle bars of a drier, and Fig.7 is a view showing how the corners are formed; The cork inserts rest uponthe surface of a small=an 1e iron 11 which is located a short distance eyondthe main corner angle iron 12. Clampmg bolts are used such as'shown in Fig. 6.

VI claim: v 1. The combination ina panel of two plates spaced apart forming thefront and-theback of the panel; a'wall extending from the front to the rear plate around the edges-of the eyond said edge wall; aflangeon said expanel; an extension on one of 'said'fplatestension projecting toward the other of-said plates whereb a channel isform'ed around 1 no the panel outsidegsaid edge l wall; 'andfg-an insert of non-conducting material located in said channel having a bearing surface ex-- at an angle with respect to said edge wallhv 2; The combination plates spaced apart forming the ront and the back of the panel; a wallextendingfrom the front to the rear platef aronnd 'the' 'edges of the.

panel; an extension on oneofsaidplates beyondsaidedge' flange on said extenplates, W ereby a channel is formed around I the panel outside said edge wall; and an insion pro'ecting toward the other of said sert of non-conducting material located in said channel havin a bearing surface extending outwardly rom said edge wall and substantially parallel to said front and back plates.

3; The combination in'a panel, of two plates spaced apart forming the front and the back of the anel, one of said plates being'bent at a an ang e at the edge and secured to the other plate; a channel beyond the edge of the bent panel; and an insert of non-conducting material located in the channel, the bearing face of the insert-material being parallel with the surfaee of the panel.

4. The combination in;a panel, of twoplates spaced apart; non-conducting material 1n the space between the plates, one of said plates being bent at an angle at its four e'd es, the end of said bent pane extending par lel with the other plate and secured thereto; a

wide channel formed on all sides of said panel; and an insert of cork or other non conducting material in the flange beyond the edge of the bent panel, the bearin surface of the insert being parallel with t e body of the panel.

WALTER M. SCHWARTZ. 

